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首页> 外文期刊>Food analytical methods >Ionic Liquid-Based Vortex-Assisted Liquid-Liquid Microextraction for Simultaneous Determination of Neonicotinoid Insecticides in Fruit Juice Samples
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Ionic Liquid-Based Vortex-Assisted Liquid-Liquid Microextraction for Simultaneous Determination of Neonicotinoid Insecticides in Fruit Juice Samples

机译：离子液体为基础的涡流辅助液体微萃取同时测定果汁样品中的新烟碱类杀虫剂

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摘要

A simple, rapid, and effective method was developed for preconcentration of neonicotinoid insecticides including clothianidin, imidacloprid, acetamiprid, and thiacloprid in fruit juice samples. Room-temperature ionic liquids [C4MIM][PF6] can be used as green extractant phases in vortex-assisted liquid-liquid microextraction (VALLME), being compatible with high-performance liquid chromatographic systems. The effect of extraction parameters, including the addition of salt, volume of (C4MIM)(PF6), vortex time, and centrifugation time is identified as the key parameters of the method. Under the selected conditions, the high enrichment factors of 100 could be achieved with the limit of detection in the range of 0.25-0.30 ng mL(-1) and with the relative standard deviations of lower than 2.68 and 5.38 % for retention time and peak area, respectively. The proposed method was applied to the analysis of fruit juice samples, and the recoveries of the analytes ranged from 95 to 108 % and relative standard deviations were lower than 7 %. The developed method proposes advantages in reduction of the exposure danger to toxic organic solvents used in the conventional liquid-liquid extraction, simplicity of the extraction processes, rapidity, and sensitivity improvement.
机译：开发了一种简单，快速，有效的方法来对果汁样品中的新烟碱类杀虫剂进行预浓缩，其中包括可尼丁，吡虫啉，乙酰胺和噻虫啉。室温离子液体[C4MIM] [PF6]可用作涡旋辅助液-液微萃取（VALLME）中的绿色萃取剂相，与高性能液相色谱系统兼容。提取参数的影响，包括添加盐，（C4MIM）（PF6）的体积，涡旋时间和离心时间被确定为该方法的关键参数。在选定的条件下，检测限在0.25-0.30 ng mL（-1）范围内，且保留时间和峰的相对标准偏差低于2.68和5.38％，可以实现100的高富集因子区域。该方法用于果汁样品的分析，分析物的回收率为95％至108％，相对标准偏差低于7％。提出的方法提出了以下优点：减少了常规液-液萃取中使用的有毒有机溶剂的暴露危险，萃取过程的简单性，快速性和灵敏度的提高。

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